Headrest



A. J. MAY

March 5, 1929.

HEADRESIT Original Filed ay 18, 1923 Patented Mar. 5, 1 929.

5;UN TED-1srar ADAM :I. MAY; ornocnnsrnn, new Yon 'ooitronerron onn-E'Lewenn.

origam application filed Ma 18; 1923, Serial. no.

K, essrdnon BY 1 Measure, essIGnfu-nn'rs, "no

Ir'rEn DENTAL 'MANUFACTTTRING-CDMIANY, 1nd,; or noonns'rlnn', new-Y RK, A

' nnAnnEsrj eseeee. Divided. and this applicatiiin filed ma as,

' 1924. Serial No -716,507.-

This invention relates-to rests of the variety adapted-for use,' for eXample,-w1th av surgical or dentallchair and, more particularly, tothe pad meansthereof for recelvlng 5 the ,patients head, the chief object of the invention being toprovi'de an improvedpad;

construction of simple and eiiicientcharac ter, comprising but few parts affording a com- 7 fortable andeffective support and capable 10 of being easily disassembled. for the purpose of/replacing the covering material or other parts.

Tothese and other .ends the invention resides in certain improvements and comblnations of parts, all as will be hereinafter more fully described the novel features being pointed outin the claim at the 'end of the specification. l I

In the. drawings: l 2O fixture. embodying the present invention Figure '2 is an enlarged; centralsectionaL view, of one of the pads andzits supporting;

means;:

t Figure 3 1s partly broken away; and

Figure A's affront view of bodypork tion of the :pad with the covering layersfremoved.

rest pad particularly suitable for use with a surgical or dental chair, having a supporting means or bracket adapted for attachment to the back of the chair with sectional parts adjustably connected with the bracket and with each other for adjustably supporting the pad so that it may be easily'located in the various different positions required in use. The supporting bracket is shown in Figure 1 as comprising a plate portion 5 adapted to he slidably supportedin suitable vertical guideways (not shown) on a chair or other article of furniture for elevational adjustment and to be clamped in position by any known and suitable means as wellunderstood in the art. The plate carries an upwardly extending arm 6 with which is pivotally connected a sectional member 7 the upper end of which has pivotally connected therewith a curved arm 8. Adjustably connected with the upper end of .Figure l is an elevation bf ahead rest of circular ordisk shape, although, ofcourse,

llne, as desired. ,Member 14: is preferably of j a rear view one. of the detached and show-ing the outer covering.

Similar reference numerals throughoutthe links being each pivotallyconnected at one to form a parallel motion linkage clamped in application is a division.

ends ofyok'e 10 is an inner yoke, 1-2 by which the pair of head pads 13 are carried in spaced relation as shown. pads is the same so that a description of one is su'flicient for both. l

Each pad comprises, preferably, a support other suitable materiahin the present instance it may have an elliptical or other form of outincreasedthickness adjacent its periphery 15,

so that the latterprojectsfbeyond the central vided with a, seat 16011 which is -carried a of soft resilient material such .for example as sponge. rubber, forming a yielding support stretched taut over the marginal portion 17] across the forward side-of the pad with the peripheral portions of the sheet folded over arm Sas'by means of links a yoke adjusted position by a handle 11. The-par-v ticular construction of thesefportions forms nopart of thepresentinvention being made the subject matter ofa copendingapplication Serial No. 639,884, filed May 18, 1923, for an invention'in head rests, of which the present Pivotally supported at its end onthe spaced The construction of both" portion on both sides, as shown in Figure 2. The periphery on the forward side is pro-;

for one or more sheets .offiexi'blka' material r a end w th the latter and at the other with arm 8 1 ing or-backing body or plate, 14, of Wood or I on the rear side of the pad and there secured as by means of a plurality of securingdevices or hooks 19 with which is engaged a draw cord 20 for stretching and holdingthe sheet which is thus supported at the front of the pad by the soft marginal portions 17 exclusively,

' In the present instance two such covering sheets are employed although one or a larger number may be used. With two sheets, however it has been found advantageous to slit l the periphery of the inner sheet to form strips 21 to avoid overlapping folds and consequent unevenness 1n th1s under sheet. The outer sheet 22 is applied and stretched by similar 7 means, the folded portions of this sheet, however, being overlapped as shown and secured by similar hooks 23 and a cord 24. The use of two sheets increases the strength and resistance of the covering and the outer sheet.

7 may if desired have its outer surface ornamentally. finished in any suitable manner...

l I enlargement or mounting 27 formed at each end of the inner yoke'12.' Mounting 27 s Thepad body or backing 14 of each pad is supported by means of a stud or screw,

threadedly engaged therewith in any suitable manner as by tapping into a metal hub 26;

The other end of the screw is carried by an constructed with a forwardly projecting cylindrical. flange 28 for engagement with the covering of the pad on the rear side thereof and the flange has a diameter sufficient for enclosing the securing books of the outer .,covering sheet as shown.

are preliminarily applied to any desired de-' 'gree. This construction provides, between the covering material on the forward side of the pad and the recess or depressed ntermediate portion of the body, a substantially airtight chamber 28 in which the'air is compressed by contact of an object with the pad to support the pad and increase the cushioning effect. By a substantially air-tight chamher is meant one which is not entirely free from leakage of air but which will permit gradual escape of a small amount of air therei from when compressed by the weight of the object temporarily supported by the pad. The leakage under such conditions is preferably permitted to take place'between certain comparatively close fittingpartsof the pad as between the flexible covering and the backing 14 and softring 17. V The gradual leakage of the air from the chamber'28 permits the head of the user to readily adjust itself to the cushion by easing-therein during the air escapeperiod and during this time the soft ring 17 is slightly compressed by thefinw'ard pressure of t e flexible coveringdue'to the Weight of the patients head thereonr Upon removing the head,- the depressed covering graduall assumes a normal position by reason 0 the refilling ofthe chamber 28 with air leaking into the same and by the expansion of the contracted ring 17 which is resilient to a considerable degree andmore or less porous.

The" construction described 'aflords a pad of a simple and'economical form'comprising but few parts combining softness and comfort for the head of the patient with the requisitev strength and durability and the covering material may be quickly and conveniently removed and'reasse'mbled' for cleaning or re-. placement as conditions may require. The pad construction as a whole is compact'in' form, with a simplicityof line affording neat and attractive appearance. g

I claim as my invention: r

In a head rest, a pad backing having a raised margin on its forward and rear sides, a sheet of flexible material stretched taut over said margin on the forward side of theb-acking to provide a resilientsupporting surface with portions of said sheet folded over on the rear 'side'of said backing, securingmeans for drawing said folded-over portions together adjacent the center of said backing rear, a mounting for said backing having a flange projecting against said folded over sheet-por-- tions and enclosing said securing means, and a support connecting the backing andlmount sheet a ing adapted for drawing said partstogether I 

